The Outbox contains messages that have not yet been read by the addressee; when that occurs, they move to the Sent box.
Tom M.

T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."Mark Twain